Brake shoe



W. H. WINTERS July 3, 1934.

BRAKE SHOE Filed Nov. 2, 1.932`

BY/WML( ATTORNEY Patented July 3, 1934 UNITED STATES PTE orrlcE BRAKE SHOE Ware Application November 2, 1932, Serial No. 640,335

1 Claim.

'I'his invention relates to brake shoes and it is especially intended for composition shoes of the type in which a composition body is held within a metal shell, but it can be used with a metal 5T body, plain or composite, if desired.

It has been customary to make the shell of thin sheet metal pressed to shape and various compositions have been used for the body. The body material is molded in the shell under pressure and is tightly held therein when the shoe is has reached its limit of wear.

My invention has for its object to provide novel means on the shell for anchoring the body therein, and which will hold the body in place in the shell against excessive relative movement in event it becomes loose in the shell, and thereby prevent the body from breaking down so that the shoe may be continued in use until worn out.

In the accompanying drawing illustrating a selected embodiment of the invention,

Fig. 1 is a side view of a shoe partly in section.

Fig. 2 is a back view of the shoe.

Figs. 3, 4 and 5 are sectional views on the lines 3 3, 4 4 and 5-5 respectively of Fig. 1.

Referring to the drawing, 6 is a shell having the usual back, sides and ends, and '7 is a composition body. According to the prevailing custom, the shell is made of sheet metal and pressed to the size and shape of the shoe desired. The body 1s made of a suitable composition which forms no part of the present invention and it is the practice to mold the body in the shell under pressure. To securely anchor the body in the shell, provide the sides 8 of the shell with a plurality of lips 9, 9 which extend longitudinally of the shell Sand project inwardly at right angles to the sides of the shell. These right angle lips are stamped in half-moon shape from the sides of the shell and they project into the body a substantial distance to effect a secure anchorage for the body n the shell. The sides of the shell are substantially parallel and, since the lips project at right angles to the sides, they are substantially parallel with the back and with the wearing face of the shoe. These lips present a substantial area of 'sustaining contact between the body and the shell (Cl. 18S-254) to retain the body in the shell even though the sides have bulged outwardly or the body otherwise becomes somewhat loosened in the shell in service. And, since the lips extend longitudinally of the shoe and project into the body at right angles to the shell and to the sides of the body, they serve to sustain and retain the body in the shell when it snugly rits the shell and even if it becomes loose in the shell and relatively movable therein. 1t is preferred that the lips be arranged in staggered relation on each side of the shell, some lips 9 being spaced from the longitudinal edges of the side and other lips 9 being stamped from the side at the outer edge thereof so that the openings 9" formed thereby will extend through the edge. The body material lls the openings during the molding operation and assists in retaining the body in the shell.

The shell may be made in various forms and I prefer to stamp end lugs 10 and strengthening ribs 11 therein. Lips 12 are also stamped from the shell on the back thereof to receive the body material and form the end guides 13. The shoe is also provided with an attaching lug 14 which may be stamped from sheet metal and secured to the shell in any suitable manner.

My invention provides a simple and effective means for anchoring the body in the shell. Ordinar-ily the body will be held tightly in the shell but luider some conditions or in the course of time the body may become a little loose in the shell and it may be capable of some relative movement in the shell but, if the body does become a little loose and does have a relative movement in the shell, the lips will still act to retain the body in the shell and prevent it from breaking down. rlhe lips present such a substantial at area of contact with the body opposed to outward movement of the body that they will retain the body in the shell even if there is considerable looseness.

do not limit the invention to the particular embodiment which has been selected for illustration and description but I reserve the right to embody the invention in any kind of brake shoe to which it is or may be adapted and to make any changes therein within the scope of the following claim which may be necessary or desirable in such embodiments.

I claim:

A brake shoe comprising a shell and a body embedded therein, said shell having a plurality of openings stamped therein at the longitudinal front edge of the sides of the shell, said openings being of half-moon shape with the straight edges of the body of the shoe being embedded in said openings and interlocked with the edges of the openings, the metal displaced in forming said openings being bent inwardly from the straight edges of the openings substantially at right angles to the sides of the shell and embedded in the body of the shoe.

WILBUR H. WINTERS. 

